It's either a leak or a head gasket.
fill the coolant reserve and the light should go out
Should be in a removable housing at the engine end of the upper radiator hose
If the low coolant message is on and you are certain that the coolant level is up, then you probably have a faulty sensor or sensor connector. The low coolant indicator should turn itself off as soon as the coolant is filled.
You fill the cooling system through resevour, it should have a cap that screws on and says DO NOT OPEN WHEN HOT.
It is always 1 to 1 ratio. If you get the premix then you dont have to mess with mixing it yourself. Good luck.
2003 Saturn Ion clunking when breaking
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YES IT CAN SO GET IT FIXED
In a box looks like 2 mountains with an arrow pointing down inbetween Answer: Your description is probably the low coolant indicator light. Even if the coolant isn't low, sometimes a sensor can give a false reading.
How do you check the transmission fluid on a 2003 Saturn vue
Saturn Ion was created in 2003.